A FOSS gaming engine stalwart made a major leap forward today. Sauerbraten/cube 2, everyone's favorite octree, in-game editing game engine has finally implemented modern dynamic lighting, making its innovative mapping system a lot more intuitive and easy to use, as well as allowing for all kinds of new game play. Tesseract loses the backwards compatibility of Cube 2 in order to take full advantage of modern gfx cards.
Personally, I'm looking forward to games that utilize to implement destructible terrain, and the inevitable Minecraft clones that come with it. So go out coders, and create!
You can find the sourcecode on Github here
EDIT: Well, that was quick! Hirato from Sandbox / Redeclipse pointed out this day/night cycle made with the new code: